How to Test Whether a Rough-Running Engine Has a Timing Problem (September 2026)?

How to test whether a rough-running engine has a timing problem

A rough-running engine can stem from many causes, but timing problems rank among the most serious and the most overlooked. Engine timing is the precise synchronization between the crankshaft, camshaft, and spark plugs, and when it drifts even one tooth out of position, your engine will let you know through misfires, vibration, and erratic idle. … Read more